Evolution of mid-infrared excess around sun-like stars: Constraints on models of terrestrial planet formation

M. R. Meyer, J. M. Carpenter, E. E. Mamajek, L. A. Hillenbrand, D. Hollenbach, A. Moro-Martin, J. S. Kim, M. D. Silverstone, J. Najita, D. C. Hines, I. Pascucci, J. R. Stauffer, J. Bouwman, D. E. Backman

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71 Scopus citations

Abstract

We report observations from the Spitzer Space Telescope regarding the frequency of 24 μm excess emission toward Sun-like stars. Our unbiased sample is composed of 309 stars with masses 0.7-2.2 M, and ages from <3 Myr to >3 Gyr that lack excess emission at wavelengths ≤8 μm. We identify 30 stars that exhibit clear evidence of excess emission from the observed 24 mm/8 μm flux ratio. The implied 24 μm excesses of these candidate debris disk systems range from 13% (the minimum detectable) to more than 100% compared to the expected photospheric emission. The frequency of systems with evidence for dust debris emitting at 24 μm ranges from 8.5% - 19% at ages <300 Myr to <4% for older stars. The results suggest that many, perhaps most, Sun-like stars might form terrestrial planets.

Original languageEnglish (US)
Pages (from-to)L181-L184
JournalAstrophysical Journal
Volume673
Issue number2 PART 2
DOIs
StatePublished - 2008

Keywords

  • Circumstellar matter
  • Infrared: stars
  • Planetary systems: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Meyer, M. R., Carpenter, J. M., Mamajek, E. E., Hillenbrand, L. A., Hollenbach, D., Moro-Martin, A., Kim, J. S., Silverstone, M. D., Najita, J., Hines, D. C., Pascucci, I., Stauffer, J. R., Bouwman, J., & Backman, D. E. (2008). Evolution of mid-infrared excess around sun-like stars: Constraints on models of terrestrial planet formation. Astrophysical Journal, 673(2 PART 2), L181-L184. https://doi.org/10.1086/527470